Gear-pump.



No. 883,931. PATBNTED APR. 7, 1908. J. G. CALLAN.

GEAR PUMP.

APPLICATION FILED NO'V.11, 1905.

' 2 SHEETS-SHEET l.

P ATENTED APR.7,1908.

G. GALLAN. GEAR PUMP.

.APPLICATION FILED`NOV.11, 1905.

,the followingis n specil e airrnin sTiiTEs rarEivT onirica .ions e. unam, or LYNN, nissAOnUsETTs, Assiexon TO uEaERAL ELECTRIC COMPANY,

A CORPORATION. or NEW YORK.

GEAR-ruine.

To all 'whom 'it 'muy concern:

Be it known dud I. Joux G. CALLAN, a citizen oi' the. l'nited States, residing at Lynn, in theconniiv ol Essex, Stute ot Massachnseftts` have invented vcertain new and useful Improvements in Gear-Pumps, ol' which ication.

The present invention .relates to gear pumps and hns lor its object to improve their construct ionA In the nceonipnnving drawings which illusf trate one embodiment ot the invention, Figure 1 is a vertieid section ot' the pump shown in position with respect to the bearings of a turbo-generator; Fig. 2 is a vertical section through the pump taken on line 2-'2 of Fig. 3 looking in the direction indicated by the arrows; Fig. 3 is a cross section taken on line of Fig. 2 looking in the direction of the arrows; Fig. 4 is a section .taken on line4-4 of Fig. 2 looking in the direction ot' the arrows; Fig. .5 is a section taken on line-5 6 of Fig. 2 looking in the direction vof the arrows, and Fig. 6 is a section taken on line 6--6 oi Fig.v 2 looking in the direction ci the arrows.

l re resents a bearing oi a generator driven y a turbine or othorsuitnble source of power. Bolted to the end ol" the bearing is a'pump casing 2 containing a horizontally disposed chamber 3 in the upper eud'to receive the driving gears,v and two vertically disposed chambers 4 and .3 which act as reservoirs for the pumps and are connected to the return side ol the systen.. In the present instance the pumps are arranged to supply fluid under pressure to the. hearings and also to the-valve mechanism; cach system being independent in" its action of the other. The upper end of the chambers 4 and 5 communicate so that in event of the level ot theV liquid rising in'one chamber above the top of the central partition 6 which acts as a dam, it can iiow into the other chamber. To the lower end of the pump structure is connected a bracket 7 that 'is secured to the frame -of the generator or other. suitable sup- 8v represents the pressure pi e of the ump emg supplied in multiple, and 9 represents the return pipe connected with the filter 10, the latter discharging into the chamber 4.

Other ressure pipes, such as 48, may lead l i to the va ve mechanism or other parts of the Specification of Letters Patent.

Application led November 11, 1905.

Patented' April 'a1-ooe.

semi No. 286,832.

l apparatus where fluid under pressure lis emi Oyed. A

p 11 represents the plate that is chambered to receive the gears 12, 13, 14 and 15. Gears 12 aud 13 constitute one pump and gears `A14 and 15, the other. The chambered plate is secured between the casing 2 and a detachable head 16 on the underside; the parts are securedi-n place by vertically extending bolts chambered plate, and a'iiange on the lower end of the casing 2. Extending vertically former driving one pump and the latter 'driving the other. These shafts pass through suitable packings 2O located above the pump gears, and packings 21 located below the pump gears.' The o enings in the lower head 16 in line with t e shaft .are closed by detachable screw threaded plugs 22. I As bei-oreI stated, the upper end of the-casing 2 is provided with a chamber 3, containing gears 23 and 24. These gears mesh with y a centrally disposed worm 25 thelatter being i mounted on a short'horizontally extending shaft 26 one. end of which extends into the adj aeentend of the shaft 27 of thegenerator o'r other rotating element and is connected to Iit by a pliue .49 to form a slip joint and permit provide aclearance' at 50` to permit a certain amount of endwise movement between the shafts 26 and 27m order that the commutatorof the generator or the motormay not be injured by the brushes wearing grooves therein. In the periphery of the shaft 26 at the generator end is formed a spiral groove 28, Fig. 3, for lubricating purposes. The left hand end of the shaft 26 is rovided with a roller thrust bearing 29 to ta e up the end thrust on the shaft. tained in a sleeve 30 that'also actsas a bearing for the worm shaft 26. held 'in place `by a detachable plate 31that alsoy covers the end of the shaft. In order that theparts may be readily assembled and taken down, a vspecial arrangement for attaching the driving gears 23- and 24 to the vertical shafts is provided. The up erend'of each shaft is provided with a shou der upon which is seated a collar 32. Surrounding the shaft and resting on the coll-ar is .a sle'eve 33, which is prevented from turning, and is through the pump are shafts 18 and 19, the

relative movement. l It is necessary to The rollers are con- 17 `which pass through the lower head, the

This sleeve is i keyed or otherwise secured tothe gear. The

hollow vertical shaft.

2 l n f 883,931

sleeve is retained in place by a nut at the top which is screw threaded to the inside of the By removing the nut and the sleeve, each gear can be shifted horizontally away from theworm 25 land then removed from the shaft. lNithout such an arrangement it would benecessary to take dow'n a largenumber of parts before the gears could be removed. The upper chamber 3 is covered by a cap 35 that contains inwardly extending projections, one of which is provided with a gutter 34, Fig. 1, for conveying lubricant from the chamber 3 and discharging it into the groove 37 in the bearing sleeve 30. l

The ump gears l2 and 15 are driven by verticaily exten ding shafts, and the Gears 13 and 14 mesh with and are driven by said gears. These gears are of the construction ordinarily emp It will be noted that the driven gears are situated at one side of the driving gears as distinguished from placing all of the gears in the same straight line. This arrangement has the advantage of producing a pump of minimum diameter.

36 represents the suction port of the pump 'on the upper side of Fig. 4 and 37 the disamount of li uidl in excess of that normally'.

*duit in' the .charge port. 38 is the suction ort for the pump on the lower side and 39 t edischarge- .Pot-

In pumps of this construction 1t is desirable to so' arrange them that they deliver an required so t at they can take care of any `'emergency condition which may arise. In order to regulate the passage of liquid through the conduit, each pump is provided on .the discharge side with an adjustable relief valve 40, Fig. .6.' Each of these valves 'is provided with a stem 41 as shown in Fig. 1,

which stem has a shoulder arranged to receive thelower end of the compression spring 42. The spring is adjusted by means of a nut 43 on the screw threaded stein. Access to this nut is had throughthe opening in the up er part of the casing, the latter being provi( ed with acurved removable cover 44 having-inwardly extending projections on the lower end. -The-relief valves can be set to give similar'or dissimilar pressures at the point of discharge. For many purposes it is necessaigfto havethe pressure of the bearing above that re uired to actuate thesvalve mechanism. `iis is the arrangement whichI prefer to emfploy.

Re errin to Fig. 2, 45 re resents a conower'head 16 of the pump'which communicateswith the return pipe 9 of the bearing or with that from the va ve actuating. mechanism. This conduit registers with the suction port 38 of one of the pumps. With i, this arrangement, little or no iiuid returning to the pump enters the chamberA or reservoir 4 because it is immediately acted upon by the oyed in pumps of this class.`

re resent vt pump and forced out again through the discharge port 39. advantages, among which-is the fact that itcreates a substantial suction in the return i e, the latter being desirable when' the u ricant is chilled and does not flow freely. On the other hand there are conditions in which the lubricant returning to the ump is moreor less frothy in' itsnature. W en this is the case it is preferable to discharge the iiuid directly into the, chamber 4 through a conduit such as 46, and from the chamber the fluid flows` to the pump through the passage 47. I may use one or both of the arrangements above described at the same time. It dependslargely upon the nature of the service 'to be performed by the pump.

In accordance with the provisions of the patent'statutes, I have described the principle 'of operation of my invention, together with the a paratus whichI now consider to Ehe best embodiment thereof, but

I4 esire to have it understood that the ap aratus shown is only illustrative, and that the invention can be carried out by other means. `l

What vI claim as new and desire to secure by Letters Patent of the United States, is,- l 1`. In a pum i, the combination of a casing Acontaining a c amber Whichacts as a reser- 9 voir, a chambered plate attached to the casing, gears in the chamber in the plate tthat act as a pump, a port leading from the reserthrough the reservoir, a second shaft for driving'the first, and gearing between the shafts. j,

2. In a ump, the combination of 4a plate having a p urahty of chambers, a set of gears pendent pump, parallel shafts for driving the pumps, driving gears on' the shafts, and

a common shaft which actuates the driving gears.v

3. In a pump,`the combination of a chambered plate, sets of gears arranged in the plate-chambers' to form pumps, a casing containing a chamber, shafts extending from the pu'mp into the casing chamber, gears on the shaftsandflocated in the casing chamber, a driving shaft located at an angle to the pump shafts, and a worm mounted on the driving shaft which is Vcommon to and engages th gears on the pump shafts.

4. In a pump, the combination of a chambered plate, gears arranged in the chamber to form a pump, a casing, a pump shaft, a two part driving shaft geared to the pump shaft, and aslip 'joint between the parts of the driving shaft. j. 1

5. In a pump, the combination of a chambered plate, ears arranged in sets in the chambers in t e plate, a headon one side of' the plate, a casing containing a reservoir on the other, pump shafts extending through This arrangement has many voir to the pump, a driving shaft passing Y arranged in each chamber to form an indesaid puinp being situated between the ports,

in such a manner as to shunt the reservoir, and a discharge port.

7. In apuiiip, the combination of a casing containing separate reservoirs, gears arranged in setsA to form pumps, each pump having asuotion and a discharge port, a relief valve on the discharge side of each pump, parallel shafts connected tothe pump gears, worm gears on t-lie puinp shafts, and a worin situated between and driving both of the worin gears.' l

8. In a pump, the combination of a charn-` bered plate, pump gears thereinarranged in sets, a head located on one side of the plate,

a casing located on the other and containing 1 reservoirs and a chamber,1 parallel shafts conneotedv to the punip gears and extending through the reservoirs into the chamber, Worin gears ori the shafts located in the chamber, a Worin situated between and engaging the gears, a two part shaft for driving the worm, and a slip joint between the parts.

9. In a. pump, the combination of pump gears, a casing therefor, parallel shafts conl iieeted to thegears, worm gears mounted onl the shafts, a worm arranged between the gears 'and engaging bo'th,fa11d sleeves situ ated between the fworm gears and their respeot-ivedriving shafts by means o'f which the gears can he removed withoutl disturbing the Worm.

r10. The oonibiimtion of a pump having rotar;r pumping members, a casing therefor,

supply reservoirs and also acts as a dam, driving shaft-s for the pumping members, pressure pipes leading from the pumps, and

ll. n combination a bearing containing a drivingshaft, a pum casing secured therereturn ipes discharging into the reservoirs. i

i to, a gear situated a jacent one cnd of the E shaft and driven thereby,a driving shaft for i' the pump receiving motion from the gear, l and a rotary pump element secured to the l rast mentioned Shaft..

In witness whereof, I have hereunto set l my hand this ninth day of -Noveiiiber 1905.\ JOHN G, CALLAN. l VVitnesses': i JOHNA. MoMANUs, Jr., HENRY O. WESTENDARP.

a partition in the, casing which forms separate Y 

